Why does one execution client still put 85 percent of Ethereum at identical risk?

Geth runs on roughly 85 percent of Ethereum execution nodes, far above the 33 percent threshold the community considers safe for any single client. A single undiscovered consensus or state-corruption bug in Geth would affect the vast majority of the network simultaneously and could cause incorrect finalization. The consensus layer improved after the Merge, with Lighthouse, Prysm, Teku, and Nimbus sharing load, but execution client diversity never followed. No friction in the staking or node setup workflow discourages an operator from choosing Geth, and no automated alert system tells the network when concentration is worsening. The community dashboard at clientdiversity.org has tracked the execution-layer gap for years without triggering a meaningful shift in operator behavior.